<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>

        .source {
            position: absolute;
            right: 0;
            top: 50px;
            width: 50px;
            height: 50px;
            background: #1756ff;
            border-radius: 50%;
        }

        .dist {
            position: absolute;
            left: 20px;
            bottom: 30px;
            width: 50px;
            height: 50px;
            background: #f00;
            border-radius: 50%;
            color: #fff;
            text-align: center;
            line-height: 50px;
            font-size: 26px;
        }

    </style>
</head>
<body>
<div class="source-warp">
    <div class="source" id="source"></div>
</div>
<div class="dist-warp">
    <div class="dist" id="dist">100</div>
</div>
<script src="index.js"></script>
</body>
</html>